Administrator of x



NITEn- STATES LIVINGSTON GIFFORD, on JERSEY bra n-NEW JERSEY, ADMINISTRATOR or KARL HEUMANN, DEOEASED,=,ASSIGNORTOYTH'EBADISOHE'ANILIN AND I SODA 'FABRIK, or LUD'WIG'SHAFEN,GERMANY.

sire e avenue-Paco s ori Mia-Km 6 same:

' r man'cmonaaa as of Letters Patent m.ie1'7,e5i, dated January 1c, 1899.

To all whom/ it may concern; Be it k'nownthat KARL I-IEUMANmdeceased, late of Zurich, Switzerland, did invent the New Dyestufi Allied to Indigo, of which the 5 following is a specification, and for which.

patents have "been obtained in the following countries: liln'gland No. 8,726, dated June ,5, 1890; France, No. 206,567, dated J une23, 1890; Belgium, No. 91,156, dated July 15, 10 1890; Germany, No. 58,276, dated August 15,

1890; Spain, No. 11,005, dated August 21,

' r 1890; Italy, XXIV, 27,841,L1V,453,dated Sep- 'tember 30, 1890, and Austria, No, 40/3302, dated December 12, 1890. 5'

In previous applicationsforLetters Patent the preparationof blueoolorirg-mntterfrom phenyl-glycocol, from phenyl-glycoeol carboxylic acid, and of a new dyestufi resent blin g indigo in many respects from tolyl-glyco- 2o col, all by the action of caustic sod orsome 3o ultimate product depends upon the condi-' tions observed when treating the said ethylphenyl-glycocol with the caustic-alkali or equivalent, as aforesaid. Thus if the ethyl phenyl-glycocol be melted with the alkali at I 35 a temperature of about 270 centigrade for a suitable lengthof time a product consistingof ordinary indigo can be obtained; but if the. operation be carried on at a higher-tempera.

49 inafter described a product-consisting, mainly or entirely, of a new dyestuif allied to indigo is obtained. The conditions of operating,

which result in the formationof a product consisting, mainly orentirely,

, digo and' which constitute a new process for the production of-indigo from ethylhenylglycoeol, are 'not claimed in this app ication forLetters Patent, but form the subject-matter'ofa separate application filed December ,ge 1?,e18fl2. Serial No. .662,306, v

and subsequently" ii turejandinthe-mennersubstantially as hereofordinary in- Application filed Deoeni'ber 17, 1397. gerial $6,652,304, (Specimensil by this application'fo'r Letters Patent is the 7 production of the aforementioned new dyefers from indigo in many respects, but re.

is preferably prepared by heating together acid and two molecular proportions of monoethyl-janilin "at first forpabout three hours at grade The product when cold is mixed with water andtreated witha slightexcess of alseparates out is removed from; the aqueous been taken, a portion of the ethyl-phenylglyco'col will separate out as'anoil. The whole can be isolated by extracting with a I is thus obtained'as a thick yellowish oil.

As an example of the manner in which this manufacture of the new indigo compound-:, -Mix about one part of ethyl-phenyl-glycocol (obtained as above described or in any other way)" with about three parts of 1 caustic potash and heat the mixturelrathenquickly to a Continue heating for some'minutes or until creases in intensity. (Jool quickly, dissolve for-ins. Filter, washwithwater containi'nga littlehydrochloric acid, then with cold alcohol, and dry the residual dyestufli. The new form is a deep-blue powder, lgiving'a lustrous u bronze lik e streak, on rubbing. Like indigo,

solution, and this isthenm'ade slightly acid l with acetic acid; If not toom'uch water has j 75.

suitable solvent, such as ether, and distilling 1 0d the solvent. The ethyl-phenyl-glycocol teinperature'of, say, about 350 centigrade. 1 I 9 the orange color of the melt no longer indyestufi thus obtained in its unsulfonated "The invention forwhich protection isasked -r stuff allied to indigo. This new dyestufi? dif 1 5s" se'mbles this most valuable dyestufli with sui permit of its substitution one molecular proportion of monochlor-acetic 1 ,atemperatureof about l00 .centigrl=,deand 4 subsequently foi'labout 'four hours longer at a temperature of about to I centi- 7 kali. "The unused monoethyl-anilin which a invention can be carried-into practical effect the following directions are given for the the melt in water, and then blow air through the solution until no more blue precipitate 95 it is insoiuble in water; but it (lifters from in iiig'o in being more soluble in most otliei'soivents in OJtilDZU use, Thus it is soluble to it certain extent in alcohol and gives on boiling in intensely-blue solution. It is also suficiently soluble in other, benzene, and glacial acetic acid to yield blue-colored solutions. It siiglitly soluble in sui'lin in the cold snri more soluble on boiiing, and. the solution is blue-green in color. It can be applied to fiber in the some ways as ordina'ry indigo-that is toss-y, it can be used in the vet or in the form of new suite-acids soluble in Water obtaineii by the action of sulfuric acid on it. The shades obtained in each case are decidedly greener than those obtainetiwith other indigo compounds now known.

In. the above, caustic soda or :1 mixture of caustic soda and caustic potash act in the some way as (loos caustic potash itseii',

It the intention to cover the Ciyestull": generiozilly witl mt limitation as to whether it be unsuifoniited 0i SllHOllftlQfL iv'luit claimed is 1. it new article oi manufacture the herein-described new dyestuii? which can be derived from ethyl -plienyl glycoool, and which in its unsiilt'onatetl form when dry is a (leeoblue powder giving a lustrous bronzelilce streak on rubbing, like indigo it is insolu ble in water but it is soluble in alcohol to it 1 certain extent giving on boiling an intenselyblue solution, it is also sufficiently soluble in benzene, GthGP'tl'ld glacial acetic acid to give blue-colored solutions, .it is soluble in unilin. in the cold and more readily on boiling and the solution is blue green; it dyes both from the vet and in the form of sulfo seicl (lecic'iedly-greenish shades of blue substantially as described.

2. The process of manufacturing 5t (lyestuff which consists in melting ethyl-phenylglycoeol M iii alkali and subsequent oxidation as by m1 air-blast, substantially as described.

LIVINGSTON GIFFORD, id-m, inismfmofz lze estate of Kai-7 Ilia/77m 1m,

deceased.

itiiesses:

Iii. WiLsox, .T; Gimme. 

